Saudade

Saudade ~ a unique Galician-Portuguese word that has no immediate translation in English. Saudade describes a deep emotional state of nostalgic longing for an absent something or someone that one loves. It often carries a repressed knowledge that the object of longing might never return. It's related to the feelings of longing, yearning.

Saudade has been described as a "...vague and constant desire for something that does not and probably cannot exist ... a turning towards the past or towards the future."A stronger form of saudade may be felt towards people and things whose whereabouts are unknown, such as old ways and sayings; a lost lover who is sadly missed; a faraway place where one was raised; loved ones who have died; feelings and stimuli one used to have; and the faded, yet golden memories of youth. Although it relates to feelings of melancholy and fond memories of things/people/days gone by, it can be a rush of sadness coupled with a paradoxical joy derived from acceptance of fate and the hope of recovering or substituting what is lost by something that will either fill in the void or provide consolation.

Saudade was once described as "the love that remains" after someone is gone. Saudade is the recollection of feelings, experiences, places or events that once brought excitement, pleasure, well-being, which now triggers the senses and makes one live again. It can be described as an emptiness, like someone (e.g., one's children, parents, sibling, grandparents, friends, pets) or something (e.g., places, things one used to do in childhood, or other activities performed in the past) should be there in a particular moment is missing, and the individual feels this absence. In Portuguese, 'tenho saudades tuas', translates as 'I have saudades of you' meaning 'I miss you', but carries a much stronger tone. In fact, one can have 'saudades' of someone whom one is with, but have some feeling of loss towards the past or the future.

* Definition pulled from Wikipedia.